This example contains a C source code that is equivalent to the following OWBasic source code; it demonstrates the usage of pointer variables. C-source:

1 int main (void) 2 { 3 int a; /* integer variable */ 4 int b[3]; /* integer array */ 5 int* p1; /* pointer to integer variable */ 6 int* p2[3] /* array of integer pointers */ 7 8 a = 0; /* a is set to 0 */ 9 p1 = &a; /* p1 points to a */ 10 *p1 = 5; /* a is set to 5 */ 11 b[0] = *p1; /* b[0] is set to the value of the variable p1 is pointing at (a) */ 12 p2[0] = &b[0]; /* p2[0] contains the address of b[0] */ 13 *p2[0] = 7; /* the value p2[0] is pointing at (b[0]) is set to 7 */ 14 p2[0][1] = 21; /* the value after the value p2[0] is pointing at (b[1]) is set to 21 */ 15 *p1 = p2[0][2]; /* a is set to the value of b[2] */ 16 p1 = p2[0]; /* p2 is assigned the address p2[0] contains (b[0]) */ 17 ++p1; /* p1 points now to the value after b[0] (b[1]) */ 18 19 return (0); 20 }

OWBasic-source:

1 DIM b[2] :! integer array 2 DIM &p2[2] :! array of integer pointers 3 4 a = 0 :! a is set to 0 5 &p1 = &a :! p1 points to a 6 p1 = 5 :! a is set to 5 7 b[0] = p1 :! b[0] is set to the value of the variable p1 is pointing ! at (a) 8 &~p2[0] = &b[0] :! p2[0] contains the address of b[0] 9 ~p2[0] = 7 :! the value p2[0] is pointing at (b[0]) is set to 7 10 ~p2[0][1] = 21 :! the value after the value p2[0] is pointing at ! (b[1]) is set 11 to 21 12 p1 = ~p2[0][2] :! a is set to the value of b[2] 13 &p1 = &~p2[0] :! p2 is assigned the address p2[0] contains (b[0]) 14 INC &&p1 :! p1 points now to the value after b[0] (b[1]) 15 16 END 0